Advanced search    

Search: authors:"Xu Liu"

54 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Optimal virtual network embedding based on artificial bee colony

As one of the key challenges in network virtualization, the problem of virtual network embedding has attracted significant attention from researchers. In this problem, it needs to embed virtual networks with both node and link demands into a shared physical network. The main goal of this problem is to embed more virtual networks to gain more revenue. However, the prior approaches ...

Dexmedetomidine sedation reduces atrial fibrillation after cardiac surgery compared to propofol: a randomized controlled trial

Background Atrial fibrillation occurs frequently in patients following cardiac surgery and can be a cause of increased morbidity and mortality. The use of dexmedetomidine to prevent atrial fibrillation is unclear. The present study was designed to evaluate the effect of dexmedetomidine sedation on the incidence of atrial fibrillation after cardiac surgery. Methods Upon arrival to ...

Knowledge about non-invasive diagnostic tests for varices in liver cirrhosis: A questionnaire survey to the Gastroenterology Branch of the Liaoning Medical Association, China

, drafted this questionnaire, performed the literature search and selection, participated in the data collection and interpretation and drafted the manuscript. Xiaozhong Guo, Hongyu Li, Xu Liu and Han Deng

Biomechanical effects of morphological variations of the cortical wall at the bone-cement interface

Background The integrity of bone-cement interface is very important for the stabilization and long-term sustain of cemented prosthesis. Variations in the bone-cement interface morphology may affect the mechanical response of the shape-closed interlock. Methods Self-developed new reamer was used to process fresh pig reamed femoral canal, creating cortical grooves in the canal wall ...

Eplerenone inhibits atrial fibrosis in mutant TGF-β1 transgenic mice

The purpose of the present study was to study the impacts of eplerenone (EPL), an antagonist of mineralocorticoid receptors (MR), on atrial fibrosis in a mouse model with selective fibrosis in the atrium, and to explore the possible mechanisms. Using mutant TGF-β1 transgenic (Tx) mice, we first demonstrated that EPL inhibited atrial fibrosis specifically and decreased macrophage ...

Existence of solution to a class of boundary value problem for impulsive fractional differential equations

By means of the Green function, the boundary value problem of a fractional differential equation can be reduced to the equivalent integral equation. Recently, this method has been used successfully to discuss the existence of the solution to the boundary value problem of a nonlinear fractional differential equation. By applying the nonlinear alternative of the Leray-Schauder type ...

Porous TiO2 Assembled from Monodispersed Nanoparticles

Porous TiO2 were assembled by evaporating or refluxing TiO2 colloid, which was obtained by dispersing the TiO2 nanoparticles with a crystallite size (d XRD) of 3.2 nm into water or ethanol without any additives. Porous transparent bulk TiO2 was obtained by evaporating the TiO2-C2H5OH colloid at room temperature for 2 weeks, while porous TiO2 nanospheres were assembled by refluxing ...

Existence of solution to a class of boundary value problem for impulsive fractional differential equations

Wen-Xue Zhou Xu Liu By means of the Green function, the boundary value problem of a fractional differential equation can be reduced to the equivalent integral equation. Recently, this method has

Some new existence and uniqueness results of solutions to semilinear impulsive fractional integro-differential equations

Wen-Xue Zhou Xu Liu Jian-Gang Zhang We consider the existence and uniqueness of solutions for the boundary value problem of semilinear impulsive integro-differential equations of fractional order q

Effect of Monospecific and Mixed Sea-Buckthorn (Hippophae rhamnoides) Plantations on the Structure and Activity of Soil Microbial Communities

This study aims to evaluate the effect of different afforestation models on soil microbial composition in the Loess Plateau in China. In particular, we determined soil physicochemical properties, enzyme activities, and microbial community structures in the top 0 cm to 10 cm soil underneath a pure Hippophae rhamnoides (SS) stand and three mixed stands, namely, H. rhamnoides and ...

Prognostic significance of synergistic hexokinase-2 and beta2-adrenergic receptor expression in human hepatocelluar carcinoma after curative resection

Background Hexokinase-2 (HK2) and Beta2-adrenergic receptor (Beta2AR) are overexpressed in hepatocellular carcinoma (HCC) tissues and associated with poor prognosis. However, the synergistic effect of HK2 and Beta2AR in HCC prognosis is not elucidated. The present study aims to investigate the association between HK2 and Beta2AR expressions in HCC tissues, and to evaluate the ...

Health-related quality of life for medical rescuers one month after Ludian earthquake

Background An earthquake struck Ludian in Yunnan province of China on August 3, 2014, resulting in 3143 injuries, 617 deaths, and 112 missing persons. Our study aimed at estimating the quality of life and associated determinants among medical rescuers after Ludian earthquake. Methods A cross-sectional survey was performed among personnel from three hospitals that assumed rescue ...

A meta-analysis of risk factors for depression in adults and children after natural disasters

Bihan Tang 0 Xu Liu 0 Yuan Liu Chen Xue Lulu Zhang 0 Equal contributors Institute of Military Health Management, Second Military Medical University , 800 Xiangyin Rd, Shanghai 200433 , China ... draft of this paper and it was reviewed by XL and LZ All authors agreed on the final draft of this study. LZ is the guarantor. Authors information Bihan Tang and Xu Liu are co-first authors of this

Cervical open-door laminoplasty technique with simple sutures and bone grafts: a single institutional study with 30 consecutive cases

Background Expansive open-door laminoplasty is widely accepted as a reliable procedure for cervical myelopathy. However, one acknowledged complication is spring-back complication or closure of the door which may result in restenosis of cervical canal and neurologic deterioration. The study aimed for addressing our cervical open-door laminoplasty technique with sutures and bone ...

Probabilistic production simulation of a power system with wind power penetration based on improved UGF techniques

. Xu LIU received the Master degree in 2013 from the School of Electrical Engineering of Shandong University, China. She is now a engineer of State Grid Zhejiang Electric Power Company Jiaxing Electric

Dosimetric benefits of placing dose constraints on the brachial plexus in patients with nasopharyngeal carcinoma receiving intensity-modulated radiation therapy: a comparative study

This study aimed to evaluate whether placing dose constraints on the brachial plexus (BP) could provide dosimetric benefits in patients with nasopharyngeal carcinoma (NPC) undergoing intensity-modulated radiation therapy (IMRT). Planning CT images for 30 patients with NPC treated with definitive IMRT were retrospectively reviewed. Target volumes, the BP and other critical ...

Association of LOX-1 gene polymorphisms with cerebral infarction in northern Chinese Han population

Background Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) plays an important role in the pathophysiology of atherosclerosis and thrombosis. This study is aimed at evaluating the potential association of 3’-UTR-C188T and G501C in LOX-1 gene with cerebral infarction. Methods A total of 386 patients with cerebral infarction and 386 healthy controls were included in ...

Are Ureaplasma spp. a Cause of Nongonococcal Urethritis? A Systematic Review and Meta-Analysis

Background Nongonococcal urethritis (NGU) is the most common male reproductive tract syndrome. Ureaplasmas spp. including U. urealyticum and U. parvum, have been increasingly reported to be implicated in NGU. However, there are still many contradictions about their pathogenic role in NGU. Aims The goals of this study were to evaluate the association of Ureaplasmas spp. with NGU, ...

Effectiveness and Safety of Chemotherapy Combined with Dendritic Cells Co-Cultured with Cytokine-Induced Killer Cells in the Treatment of Advanced Non-Small-Cell Lung Cancer: A Systematic Review and Meta-Analysis

Background Lung cancer, particularly non-small-cell lung cancer (NSCLC) is the leading cause of cancer mortality. Chemotherapy combined dendritic cells co-cultured with cytokine-induced killer cells (DC-CIK) immunotherapy has been applied in advanced NSCLC patients' treatment, but couldn't provide consistent beneficial results. Therefore, it is necessary to evaluate the efficiency ...

In Silico Identification and In Vitro and In Vivo Validation of Anti-Psychotic Drug Fluspirilene as a Potential CDK2 Inhibitor and a Candidate Anti-Cancer Drug

Hepatocellular carcinoma (HCC) is one of the leading causes of cancer-related deaths worldwide. Surgical resection and conventional chemotherapy and radiotherapy ultimately fail due to tumor recurrence and HCC’s resistance. The development of novel therapies against HCC is thus urgently required. The cyclin-dependent kinase (CDK) pathways are important and well-established targets ...